Hardiness Map

When used in combination with the AHS Heat Zone Map, your plants will thrive!

Decades of Data

In January 2012, the United States Department of Agriculture (USDA) released an updated version of their Plant Hardiness Zone Map. Oregon State University’s PRISM Climate Group used sophisticated mapping technology and 30 years of meteorological data to create this new web-friendly version. First published in 1960 and updated in 1990, this map is designed to help gardeners and growers determine which plants will "winter over" in their hardiness zone.

Because heat is also an important factor in determining which plants will survive in a given region, the American Horticultural Society developed the Plant Heat Zone Map to provide guidelines for the other end of the temperature spectrum

AHS Travel Study Program

NCYGS | July 2015

The only national event of its kind where you can network with like-minded teachers, garden designers, community leaders, program coordinators, and others involved with connecting kids to the natural world.